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Патент USA US3052565

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Sept. 4, 1962
3,052,554
B. W. COLMAN
POPCORN PACKAGE
2 Sheets-Sheet 1
Filed Nov. 16, 1960
FIG. 2
FIG.4 I
FIG. 3
FIG. 6
FIG. 7
IN VENTOR.
BENJAMIN W. COLMAN
BY
FIG.8
mm, M 55m“
ATTORNEYS
Sept. 4, 1962
B. w. COLMAN
3,052,554
POPCORN PACKAGE
Filed Nov. 16, 1960
2 Sheets-Sheet 2
INVEN TOR.
BENJAMIN W. COLMAN
BYMI MSEKLW
ATTORNEYS
3,052,554
an
United States Patent O ice,
Patented Sept. 4., 1962
2
1
the internal pressure within the pouch increases and the
3,052,554
Benjamin W. Colman, Huntington Woods, Mich.
pouch in?ates, the outer adhesive secured edges begin to
Filed Nov. 16, 1960, Ser. No. 69,707
9 Claims. (Cl. 99-171)
appears to bring about a vent opening in an edge so that
the internal gases escape with relative ease. The vent
POPCORN PACKAGE
This invention relates to popcorn packages ‘and more
particularly to a popcorn package which is made in a ?at
in?atable, expandable pouch of metal foil containing pop
corn grains with or without a frying fat.
The popcorn
wrinkle in some short sections. The combination of the
mechanical wrinkling and the softening of the adhesive
opening, however, does not enlarge beyond that required
to release the gases generated within the pouch, and only
infrequently does any of the contained popcorn escape
through this edge vent.
It is an object of the invention to provide a ?at metal
foil pouch for the popping of corn having only two ?at
layers of very light gauge metal foil formed from a
pouch made of one or two sheets of light gauge metal
single or two sheets of foil. Another object is to pro
foil, such as aluminum foil. In the pouch made of a
single sheet of metal foil, the sheet can be folded to pro 15 vide such a pouch within which the popcorn is popped.
Yet another object is to provide a metal foil pouch con?
vide one folded side edge of the pouch, the two layers,
taining popcorn grains with or without a frying fat, which
formed by folding, overlying each other in substantially
is ?at, takes up a minimum of space, and whose thick
face to face relationship and secured together substan
ness is substantially limited to the thickness of the two
tially along their edges by adhesive or mechanical means.
In the two sheet pouch, a ?rst sheet of metal foil, cut 20 foil layers, the popcorn, and the frying fat, if any. A
further object is the provision of a ?at metal foil pouch
in rectilinear or circular shape is charged on its surface
which is in?atable and expandable, upon heating of the
with popcorn grains and, if desired, with a frying fat, pref
gases within the pouch and upon the explosion and ex
erably in plastic rather than liquid form. An adhesive
pansion of popcorn grains, to a rotund chamber many
stripe is imprinted upon the metal foil sheet adjacent its
edges. The second or covering metal foil sheet, in the 25 times the volume of the pouch in its initial ?at state.
Still another object is the provision of a ?at metal foil
same form and size, is laid upon the ?rst sheet, closely
pouch which is heatable in a vessel, adapted in its initial
overlying the corn and fat. The second sheet is also
state and form to readily conform to the contours of the
provided with an adhesive stripe along its edges so that
vessel, and to receive heat from the vessel, whereby the
the two adhesive stripes will come into register with each
popcorn grains contained in the pouch can be exploded
other.
and expanded into popcorn for consumption within the
An adhesive which has been used and appears adequate
pouch.
for securing the edges of the foil sheet or sheets together
grains are popped directly in the flat pouch.
The invention involves a flat, in?atable, expandable
is a neoprene reacted-phenolic adhesive. Such an adhe
sive is acceptable under the Federal Food and Drug Act,
as presently in force.
In the prior art, popcorn packages previously developed
and placed on the market have required a relatively rigid
bottom pan of considerably greater thickness and of ?xed
volumetric measure ?tted with an enlarged infolded metal
The amount of popcorn grains charged into the pouch
foil cover adapted to expand above the pan. To appli
is determined by the volumetric capacity of the pouch
cant’s knowledge, a ?at, in?atable, expandable metal foil
when in?ated. Popcorn expands about 30 times its orig
pouch formed of a single or two layers of very light
inal size. A pouch approximately nine or ten inches
square, when ?at, and charged with a quarter pound (4 40 gauge metal foil, lacking self-supporting characteristics,
and containing popcorn grains and a frying fat has not
ounces) of unpopped corn and about two ounces of plas
tic frying fat or shortening, in?ates to a volumetric ca
pacity large enough to accept and retain all of the pop
heretofore been known not considered as a means by
which corn may be popped therein. The unobvious re
sults achieved by a ?at metal foil pouch formed to two
corn. The popcorn grains are in an amount less than
such layers include the discovery that a ?at metal foil
will fully cover the entire surface of one side of one 45
layer of metal foil.
As the metal foil pouch expands,
upon the application of heat, it assumes a rotund or pil
pouch is expandable into a rotund chamber of substantial
volumetric capacity upon heating and expanding the
gases of a frying fat, and exploding popcorn therein. In
addition, a ?at metal ‘foil pouch formed of a single or
two
very light ‘gauge metal foil sheets is much less ex
50
corn grains tend to move toward and to concentrate upon
pensive than preformed heavy gauge metal foil pans
the bottom of the rotund pouch (Where the pouch is in
press formed from metal about seven (7) to ten (10‘)
contact with a heating surface and the greatest amount
times thicker than one of the foil sheets. The simplicity
of heat is present, and are there exploded, ?ying into and
of
securement together of the edges of the single or two
?lling the enlarged chamber of the pouch.
The metal foil pouch package is heated in a household 55 metal foil sheets by an adhesive, which can be imprinted
by a roller or silk-screened onto the foil sheets, further
utensil or vessel, such as a ‘frying pan, or in {another
simpli?es the processing of the popcorn package of this
usual cooking utensil of that type, having a bottom heat
invention by comparison to those heretofore known and
ing surface coming into contact directly or indirectly with
made, and permits a marked reduction in costs and the
a source and supply of heat. The pouch package is
low shape having somewhat semi-elliptical upper and low
er sections. By shaking or moving the pouch, the pop
placed directly upon the bottom heating surface of the 60 market selling price. Add to this the simplicity of boxing
?at pouches, a reduction in market shelf space require
utensil and there receives the heat from the utensil which
ments, transportation savings occasioned by more com~
will explode and pop the corn within the pouch. When
pact packages, ‘and the desirable and unobvious advan
the popcorn has been exploded, the top layer of foil is
tages of the instant invention become instantly apparent.
ripped open and the popcorn is ready for consumption.
Another unexpected result of the instant invention is
65
Salt, butter, syrup, or other seasonings may be added to
the popcorn while it is in the opened pouch, or the pop
that the use of a frying pan or other base utensil for heat
ing the inventive popcorn package heredisclosed provides
corn can be discharged into a bowl or ‘other vessel and
there seasoned to suit the taste.
a heat distributing device under the package which sub~
stantially eliminates burning of the corn if the package
The adhesive securing the edges of the metal foil sheet 70 is properly handled by shaking. The to-and-fro sliding of
or sheets together tends to soften slightly under the con
tinued application of heat to the metal foil pouch. As
the fry pan over the heating unit causes the corn in the
package to move relative to the foil layer resting on the
3,052,554
3
4
bottom of the fry pan. As the package pouch in?ates,
at the bottom of the bowl-shaped portion which is in
As a representative example or embodiment only of
such packages 10 which are disclosed herein, the top foil
layer 12 is made of aluminum foil .0005” thick, the bot
tom foil layer 14 is .0007” thick, and about 4 ounces of
popping corn is charged into the pouch. If used, the fat
direct contact with the bottom of the fry pan. Because
the area of the fry pan is many times larger than the area
13 is added in amounts of from 1 to 4 ounces, depending
upon the desires of the person making the popcorn for
of the pouch bottom portion in contact with the fry pan
a fatty or oily coating on the popped corn. The pouch
the bottom foil layer portion of the pouch assumes, and
is caused to assume a concave, dished, bowl-shaped form.
The popcorn grains within the pouch tend to concentrate
after the pouch has in?ated to its rotund shape, the heat
is formed to a square of about 9 to 10* inches per side.
directed to the fry pan is broadly distributed and is not 10 When the foil sheets are secured along their edges 20
concentrated upon the small pouch bottom portion in con
with adhesive 22, the package 10 is relatively air-tight.
tact therewith. Thus, heat is not concentrated across the
Slight modi?cations of the package 10 include closing
entire pouch bottom layer in such amounts as to readily
the edges by overfolding on each side into the folded edges
burn the popcorn.
24 (FIG. 6), or by mechanically crimping the edges to
These and additional objects of the invention and
gether between dies in a pressing or rolling operation into
features of construction Will become more readily ap
the crimped edges 26 (FIG. 7), or by die cutting the
parent from the description given below in which the terms
employed are used for purposes of description and not
of limitation. Reference is made to the drawing annexed
pouch foil into circular shape and sealing the edges 28
with adhesive 22 (FIG. 8).
The frying fat 18 can ‘be any suitable type of cooking
hereto, forming an integral part of this speci?cation, and 20 shortening, preferably in a plastic state; or a cooking
in which
FIG. 1 is a perspective view of one embodiment of the
?at metal foil popcorn package of this invention.
oil may be used, in which latter case the metal foil
pouch should be checked for leaks, pinholes in the foil,
and edge sealing.
FIG. 2 is a vertical sectional view taken substantially
The bottom metal foil layer 14 preferably ranges
on the line 2—2 of FIG. 1.
25 from .0005” to .001” in thickness and still permits the
FIG. 3 is a perspective view of the ?at metal foil pop
package 10 to expand. Of course, the lighter the metal
corn package of FIG. 1 disposed in a heating vessel.
‘foil gauge the more readily the pouch will expand. The
FIG. 4 is an enlarged vertical sectional view of the metal
top metal ‘foil layer 12 is preferably made of .0005"
foil pouch in its in?ated state after heating in the vessel
thick foil, although metal foil from .0003” to .001” in
shown in FIG. 3.
30 thickness can be used. The internal pressure of the
FIG. 5 is a view similar to FIG. 2, in which the ?at
gases generated by the frying fat and by the exploded
metal foil pouch contains popcorn and a frying fat.
popcorn is considerable and the pouch in?ates in a
FIGS. 6 and 7 are fragmentary perspective views of
very positive manner to form a rotund chamber large
slight modi?cations of the ?at metal foil pouch.
enough to receive the popped corn.
FIG. 8 is a perspective view of another form of the ?at 35
In the preferred form of the package 10, in the initial
metal foil pouch, with ‘a portion broken away.
?at pouch form the top foil layer 12 is free of vent holes;
FIG. 9 is a perspective view of a single sheet metal foil
however, a top vent hole (not shown) may be pierced
pouch, formed by folding the sheet into two overlying
in the foil layer 12 before popping the corn, if desired.
layers.
The pouch 40 made of a single sheet of metal foil,
FIG. 10 is a vertical sectional view of the pouch pack
illustrated in FIGS. 9 and 10, is provided with a folded
age of FIG. 9 expanded in a fry pan after popping the
edge 42, a top layer 44, a bottom layer 46, and over
corn.
lying side edges 48 secured together with adhesive 22.
FIG. 11 is a perspective view :of ‘another single sheet
Popcorn grains 16, and optionally, frying fat 18 are
metal foil pouch, formed by folding the sheet into two
contained within the pouch 40.
upper layer portions secured together at their edges and
form of a single sheet metal foil pouch is
overlying the lower layer, the ends of the upper layer 45 theAnother
pouch 50 illustrated in FIGS. 11 and 12. The pouch
and lower layer portions being secured together.
50' is formed with two ‘folded edges 52, 54 providing two
FIG. 12 is a vertical sectional view taken substantially
top
layer portions 56, 58 having their edges 60, 62, re
on the line 12-12 of FIG. 11.
spectively, meeting intermediate the side edges. The
As shown in the several views of the drawing, and
edges 60, 62 are secured together with adhesive 22 so
particularly in FIGS. 1, 2, 3, 4 and 5, the ?at metal foil 50 that
the top layer portions 56, 58 form a single top layer
popcorn package 10 comprises a pouch formed of a top
over
the bottom layer 64. The end edges 66, of the top
layer of metal foil 12, a (bottom layer of metal foil 14,
layer portion 56, and 68, of the top layer portion 58,
and popcorn grains 16. The package 10 can optionally
are secured to the end edges 70 of the bottom layer 64
also contain an amount of frying fat 18. The two layers
by adhesive 22, providing a closed ?at metal ‘foil pouch.
of metal foil 12 and 14 are secured together adjacent their
Popcorn grains 16, and, optionally, frying fat 18 are
outer edges 20 by a suitable adhesive 22 disposed there
contained within the pouch 50.
between.
Pouch packages 40 and 50, preferably made of .0007
The popcorn grains 16, being of relatively small volume
inch thick foil, are used and operated in the same man
in the unpopped state, lie upon the bottom foil layer 14,
the top covering foil layer 12 directly overlying the corn 60 ner as pouch package 10‘.
In operation, the pouch package 10, 40 or 50 is laid in
and the bottom layer 14 in face to face relationship. In
a vessel such as the frying pan 30 (FIGS. 3 and 4), or
the pouch package 10 containing popcorn grains 16 and
upon a griddle plate or other cooking utensil suitable for
fat 18, FIG. 5, the layer of corn and fat may be slightly
accepting and transmitting heat to the package. The
thicker due to the layer of fat, but it is still quite ?at.
An adhesive 22 which has been used and found satis 65 pouch package is deformed to accommodate the contour
of the heating surface of the device 30, and to place a
factory is a neoprene reacted-phenolic adhesive. Such
layer of the pouch as a ?at side thereof directly upon the
an adhesive has met the requirements of the Federal Food
heating surface of the device. As heat is applied to the
.‘and Drug Administration. The adhesive is applied as a
bottom of the vessel, heat is transferred to the foil pouch
stripe of relatively narrow width along or adjacent the
._edges of the foil layers 12 and 14, on one side of each of 70 resting thereon, the pouch is caused to in?ate and to ex~
pand into a rotund chamber, and the corn is popped. In
the layers. The adhesive stripes are placed in register
the pouch package 10, 40 or 50 containing popcorn '16
with each other by bringing the two foil layers into edge
contact with each other over the popcorn grains and fat.
and fat 18, both the heated fat and the exploding pop
The adhesive is then activated by heat and a slight amount
corn emit gases that ?ll and expand the pouch to its en
of pressure to provide an edge secured pouch.
75 larged capacity. In the pouch package without fat, the
3,052,554
5
small amount of air within the flat metal foil pouch in its
compressed state and the exploding popcorn ?ll and ex
pand the initially ?at metal foil pouch. As the pouch in
?ates and expands, .the top and bottom foil layers 12 and
\14 move ‘apart at their centers forming the rotund cham
ber 32 shown in FIG. 4 or the rotund chamber shown in
FIG. 10. The popping of the corn 16 is preferably ac
companied by shaking the pan 30 so that the pouch is
caused to move, and to eliminate or reduce burning and
6
is the greatest. The metal foil pouch package is deform
able to fit a heating pan without impairing the utility of
the package.
The popcorn pouch package of this invention can also
be produced by forming a metal foil pouch such as that
represented by 10, 40 or 50' provided with an opening or
entry port for popcorn grains 16 which are packaged
separately. A quantity of popcorn grains could be in
serted through the pouch port and the pouch sealed about
sticking of the popcorn grains to the lower foil layer of 10 the popcorn grains to form a popcorn package embody
ing the invention.
the pouch.
The use of two very thin‘ layers of metal foil provides
It has been found that the corn in the package 10, 40
an inexpensive popcorn package, providing the same
or 50 can be popped without shaking by placing the pack
:age in a controlled-‘heat electric fry pan. The heat con
trol should be set for a temperature of from 500i°-700° F.
Temperatures below 500° heat the corn too slowly and
popping of the corn is somewhat less effective and the
amount of popcorn as in other popcorn packages but at a
great reduction in cost. The package of this invention will
therefore sell at a much lower price than currently mar
keted popcorn packages. Although the same amount of
popcorn grains are used, the package cost is less than V2
quality of the popped corn less desirable. When the
the cost of these other packages, and permits substantially
temperature of the pan has reached the temperature set
ting, the popcorn package is placed on the bottom of the 20 the same pro?t margins.
electric fry pan. Within minutes the pouch package has
in?ated and the corn has popped. No shaking is required,
(and the corn does not burn.
When a pouch package made with mechanically over
folded edges 24 or crirnped edges 26 has in?ated substan
tially, it may be desirable to pierce .the top foil layer 12
with an instrument to provide a limited vent opening
34 for the gases generated within the pouch, to reduce the
internal pressure acting on the edges or seams of the
package, as well as to prevent an enlarged disassociation
of such mechanically secured edges.
The neoprene reacted-phenolic adhesive 22 appears to
Having described the invention in its simplest terms, it
is to be understood that the features of the construction
can be changed and varied in greater or lesser degree With
out departing from the essence of the invention de?ned in
the appended claims.
I claim:
1. In a popcorn package in which popcorn is prepared
for consumption, a ‘closed ?at, in?atable, expandable,
pouch formed of metal foil, popcorn grains contained
within said pouch, said pouch essentially consisting of a
?rst ?at substantially uniplanar layer of metal foil, a layer
of popcorn grains and a second ?at substantially uniplanar
layer of metal foil overlying said popcorn grains, said
pouch having one of said layers of metal foil as a ?at side
edges. In packages tested with the adhesive, the infla
tion of the pouch under heat and the mechanical wrinkling 35 thereof adapted to rest upon and to receive heat from a
heated surface, whereby when su?icient heat is received
occasioned by such in?ation ‘and the heating of the metal
by said pouch ?at side said pouch is caused to in?ate and
foil so that a-certain amount of adhesive softening oc
expand and substantially distort both said layers upon the
curs results in a vent opening in an adhesive-secured edge
heating of gases therewithin ‘and upon the explosion of
so that the internal gases escape with relative ease. The
said popcorn grains, forming an enlarged chamber to con
vent opening does not enlarge beyond that required to
tain said popcorn in its exploded expanded state.
release the gases generated Within the pouch, and only
2. In a popcorn package in which popcorn is prepared
infrequently does any of the popped corn escape through
for consumption, a closed flat, in?atable, expandable
this edge vent.
pouch of metal foil, popcorn grains contained within said
After the popcorn grains 16 have been popped in the
pouch, the top vfoil layer is torn open and the popcorn is 45 pouch, said pouch except for its contents comprising .a
plurality of ?at layers of metal foil in face to face rela
available for consumption. Salt and butter, or other sea
tionship, said pouch having one of said layers of metal
soning may be added, if desired. The popcorn can be
foil as a ?at side thereof adapted to rest upon and to re
emptied from the pouch into the bowl, or served in the
ceive heat from a heated surface, whereby when su?icient
pouch, the latter providing a heat-containing vessel to
heat is received by said pouch ?at side said pouch is caused
keep the popcorn Warm.
to in?ate and expand and substantially distort said layers
The metal foil pouch package comprises two ?at layers
upon the heating of gases therewith and upon the explo
of metal foil which are extremely thin in thickness, each
sion of said popcorn grains, forming an enlarged chamber
layer being less than .002 inch. The thickness of the
to contain said popcorn in its exploded expanded state.
pouch in its initial compressed state except for the pop
3. In a popcorn package in which popcorn is prepared
corn grains is less than 1A6 inch. In either the single
for consumption, a closed ?at, in?atable, expandable
sheet or two sheet metal ‘foil pouch, the metal foil on both
pouch of metal foil, popcorn grains contained within said
sides of the pouch is substantially of the same thickness,
pouch, said pouch except for its contents comprising two
so that either side can be placed on the heating surface
flat layers of metal foil, said two ?at layers of metal foil
of ‘a device being heated. The metal foil pouch package
being of such thickness that either layer of metal foil can
comprises two thin ?at layers of metal foil, with popcorn
provide an advantage over mechanically closed or locked
grains therebetween in a thin layer, in face to face rela
tionship. The metal foil is so thin that the pouch package
is not self-supporting when it is grasped at one side edge,
but drops down ‘where grasped. Because both layers of
the metal foil ‘are so thin, they are easily subject to frac
ture or tearing by undue mishandling, ‘although this same
characteristic permits the pouch package to be readily de
formed to accommodate the contour of a heating surface,
and, when heated, to readily deform from its ?at state
into [an in?ated, expanded rotund chamber to contain the
popped corn. Further, the very thin metal foil bottom
layer in contact with the heating surface curves into a
bowl shape during heating of the pouch so that the pop
corn grains tend to concentrate rat the bottom of the
be placed upon and receixie heat from a heated surface,
whereby when suf?cient heat is received by said layer of
metal foil said pouch is caused to inflate and expand and
substantially distort both of said layers upon the heating
of gases therewithin and upon the explosion of said pop
corn grains, forming an enlarged chamber to contain said
popcorn in its exploded expanded state.
4. In a popcorn package in which popcorn is prepared
for consumption, a closed ?at, in?atable, expandable
pouch of metal foil, popcorn grains contained within said
pouch, said pouch except for its contents essentially con
sisting of two ?at layers of metal foil, said pouch having
one of said layers of metal foil as a ?at side thereof
adapted to rest upon and to receive heat from a heated
curved foil layer, where the heat into the package pouch 75 surface, the thickness of said ?at side layer of metal foil
aosasea
7
resting upon said heated surface being such that during
heating said ?at side will readily deform into a bowl
shape and tend to concentrate said popcorn grains at the
bottom of said bowl shape where said pouch is in con
lower layer of metal foil as a ?at side thereof adapted to
rest upon and to receive heat from the heating surface
of a device being heated, whereby when su?icient heat
tact with said heating surface and the heating of said
is received by said pouch flat side said pouch is caused
to in?ate and expand upon the heating of gases there
pouch is greatest, whereby when suf?cient heat is received
by said pouch ?at side said pouch is caused to in?ate and
expand and to substantially distort both of said layers
forming an enlarged chamber to contain said popcorn in
within and upon the explosion of said popcorn grains,
its exploded expanded state.
upon the heating of gases therewithin and upon the ex
8. In a popcorn package in which popcorn is prepared
plosion of said popcorn grains, forming an enlarged cham 10 for consumption, a closed ?at, in?atable, expandable
her to contain said popcorn in its exploded expanded state.
pouch formed of metal foil, popcorn grains contained
5. In a popcorn package in which popcorn is prepared
within said pouch, said pouch essentially consisting of a
for consumption, a closed ?at, in?atable, expandable
?rst ?at substantially unipl'anar layer of metal foil, a
pouch of metal foil, popcorn grains contained within said
layer of popcorn grains and a second ?at substantially
pouch, said pouch except ‘for its contents essentially con 15 uniplanar layer of metal foil overlying said popcorn
sisting of two flat layers of extremely thin metal foil, the
grains and in face to face relationship with said ?rst layer
metal foil pouch package containing said popcorn grains
of metal foil, the thickness of said pouch in its compressed
being without su?’icient rigidity to support itself when
?at state except for its contents being less than one
grasped at one side edge of said pouch package, said
sixteenth inch, said two ?at layers of metal foil being of
pouch having one of said layers of metal foil as a ?at side
thereof adapted to rest upon and to receive heat from a
heated surface, whereby when su?icient heat is received
by said layer of metal foil placed upon said heated surface
said pouch is caused to in?ate and expand and to substan
tially distort both said layers upon the heating of gases
therewithin and upon the explosion of said popcorn grains,
forming an enlarged chamber to contain said popcorn in
its exploded expanded state.
6, In a popcorn package in which popcorn is pre
substantially the same thickness, the amount of popcorn
grains in said pouch being limited to an amount less than
enough to cover the entire surface of one side of one layer
of said metal foil, each said layer of metal foil being less
than .002 inch in thickness, said pouch package contain
ing said popcorn grains being without suf?cient rigidity to
support itself when grasped at one side edge of said
pouch package, said two layers of metal foil being secured
together along their edges by an adhesive and forming
said pouch, said pouch having one of said layers of metal
pared for consumption, a closed flat, in?atable, expand 30 foil as a ?at side thereof adapted to rest upon and to
able pouch of metal foil, popcorn grains contained within
receive heat from a heated surface, said pouch package
said pouch, said pouch except for its contents comprising
being deformable to ?t the inside con-tour of said heated
two flat layers of metal foil in ‘face to face relationship,
surface without impairing the utility of said pouch pack
said pouch being formed of a single sheet of metal foil,
age, the thickness of each of said two ?at layers of metal
said sheet being folded upon itself to provide an upper 35 foil being such that during heating of said ?at side both
layer and a lower layer, said two layers being secured
together to form said pouch, said pouch having one of
said layers of metal foil as a ?at side thereof adapted to
rest upon and to receive heat from the heating surface of
a device being heated, whereby when su?‘icient heat is re
ceived by said pouch flat side said pouch is caused to in
?ate and expand upon the heating of gases therewithin and
upon the explosion of said popcorn grains, forming an
enlarged chamber to contain said popcorn in its exploded
expanded state.
7. In a popcorn package in which popcorn is prepared
for consumption, a closed ?at, in?atable, expandable
pouch of metal foil, popcorn grains contained within
said pouch, said pouch except for its contents comprising
two ?at layers of metal foil in face to face relationship, 50
said pouch being formed of a single sheet of metal foil,
said sheet being folded upon itself to provide two» upper
layer portions aligned in substantially the same plane and
a lower layer and having two folded side edges, said
two upper layer portions being secured together inter
mediate said folded side edges, the ends of said lower layer
and said two upper layer portions being secured together
to provide said closed pouch, said pouch having said
layers of said pouch will readily deform to form a hollow
rotundity and tend to concentrate said popcorn grains
at the bottom of said rotundity where said pouch is in
contact with said heated surface and the heating of said
pouch is greatest, whereby when su?icient heat is re
ceived by said pouch ?at side said pouch is caused to in
?ate and expand and to substantially distort both said
layers upon the heating of gases therewithin and upon
the explosion of said popcorn grains, forming an en
larged chamber to contain said popcorn in its exploded
expanded state.
>
9. The structure de?ned in claim 3, and in which either
of said layers of metal foil is less than .002 inch in
thickness.
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,633,284
2,673,805
2,673,806
2,702,246
2,819,976
Moffet-t et al. ________ __ Mar.
Colman ____________ __ Mar.
Colman ____________ __ Mar.
Kinsella _____________ .._ Feb‘.
Hines ________________ __ Jan.
31, 1953
1954
1954
1955
1958
30,
30,
15,
14,
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